Malicious PDF — malware analysis report

Static analysis result for SHA-256 0563cc5de29b5b03…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 04:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: de2ecd9c454515aa6ee1ac2b11aed67e SHA-1: c95761f046420bb1bd33cea9d75249c614fe41ae SHA-256: 0563cc5de29b5b03f248c53fd4b0814a8487be43e88bb2ea5d6d15d6abbb72dc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing or trojan variant. The embedded URLs and the document's structure suggest an attempt to drive traffic to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bologen.ru/award?keyword=metodo+descriptivo+concepto+pdf PDF link annotation
    • http://afracheat2.xyz/carrera_alimentos_y_bebidas_conalepc2kb2.pdfIn PDF document text
    • https://linikakisevokeg.weebly.com/uploads/1/3/6/0/136098208/3022954.pdfIn PDF document text
    • http://noksipals.online/how_to_count_month_and_days_in_excel7zfga.pdfIn PDF document text
    • http://7lessons.fun/descargar_diccionario_frances_espaol_apk22yja.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/mizovajoronos.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/N2jjgeu/fasubipexixapo.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/shimano_fishing_reels_wholesale7uxxt.pdfIn PDF document text
    • https://cdn.sqhk.co/kususarefeja/39wtBor/zombies_2_crazy_games.pdfIn PDF document text
    • http://sfr-espace.best/2016_cadillac_xt5_owner_s_manual5be1t.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/h8khhY6/common_core_multiplication_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/sesizame/ji4ZLjq/72843041906.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/DI6ZgjX/lidipufalekaradiw.pdfIn PDF document text
    • http://antonioita.fun/dikatututenukorew1oz.pdfIn PDF document text
    • http://mestorating.ru/free_hd_movies_and_tv_shows_apkj9kdy.pdfIn PDF document text
    • https://misetibu.weebly.com/uploads/1/3/1/4/131438078/tezanobowabeke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_22dd098e6ff747a1b90b7e05a1d48169.pdf?index=trueIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_57d8f7684bfa4132b9bda26b399fe49a.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_a91651250a5c4e21b384e24e4088a904.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_b5664b67197b4cfa92e28413e54d5d36.pdf?index=trueIn PDF document text
    • https://48936d5e-4b15-4059-a328-ddb12afcc15e.filesusr.com/ugd/173145_f7fbd561de3c4d8dac3afecce9c9e1da.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF291 4972 bytes
SHA-256: 1d208a2d96620fd3158f31c4a63abb091e617c304b2bbc073049da5deade13e8
font_01_sfnt_off000103a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A8 11372 bytes
SHA-256: 862a2f8bf43b4a090d087c76a0f7c3e45f5965195bb2337d70ce005ccd4f2e44